1. Stanway G, Hyypia T, Knowles NJ, Hovi T. Biological and molecular basis of picornavirus classification. In: Semler BL, Wimmer E, editors. Molecular biology of picornaviruses. Washington: ASM Press; 2002. p. 17–24.
2. Properties of ECHO types 22, 23, and 24 viruses.;Wigand;Arch Gesamte Virusforsch,1961
3. Parechoviruses, a novel group of human picornaviruses.;Joki-Korpela;Ann Med,2001
4. Diagnosis and epidemiology of echovirus 22 infections.;Joki-Korpela;Clin Infect Dis,1998
5. Human parechoviruses—biology and clinical significance.;Stanway;Rev Med Virol,2000